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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 56 · 40 questions
TalentJR

How it works (Round and adjust): Round up: 49 is 50 − 1, 98 is 100 − 2. Multiply by the round number. Take away the number times the bit you added.

NameDateTime takenScore ___ / 40
  1. 1.8 × 19 =
  2. 2.5 × 29 =
  3. 3.5 × 29 =
  4. 4.5 × 49 =
  5. 5.10 × 19 =
  6. 6.15 × 49 =
  7. 7.3 × 49 =
  8. 8.12 × 19 =
  9. 9.23 × 98 =
  10. 10.13 × 9 =
  11. 11.6 × 19 =
  12. 12.6 × 99 =
  13. 13.5 × 19 =
  14. 14.3 × 9 =
  15. 15.26 × 99 =
  16. 16.8 × 29 =
  17. 17.14 × 98 =
  18. 18.12 × 49 =
  19. 19.7 × 49 =
  20. 20.4 × 98 =
  21. 21.10 × 99 =
  22. 22.28 × 98 =
  23. 23.4 × 9 =
  24. 24.7 × 19 =
  25. 25.10 × 29 =
  26. 26.13 × 9 =
  27. 27.4 × 19 =
  28. 28.40 × 98 =
  29. 29.40 × 99 =
  30. 30.21 × 99 =
  31. 31.9 × 98 =
  32. 32.13 × 98 =
  33. 33.7 × 98 =
  34. 34.15 × 19 =
  35. 35.26 × 99 =
  36. 36.9 × 19 =
  37. 37.5 × 19 =
  38. 38.10 × 9 =
  39. 39.15 × 49 =
  40. 40.8 × 49 =

Answer key

  1. 152
  2. 145
  3. 145
  4. 245
  5. 190
  6. 735
  7. 147
  8. 228
  9. 2254
  10. 117
  11. 114
  12. 594
  13. 95
  14. 27
  15. 2574
  16. 232
  17. 1372
  18. 588
  19. 343
  20. 392
  21. 990
  22. 2744
  23. 36
  24. 133
  25. 290
  26. 117
  27. 76
  28. 3920
  29. 3960
  30. 2079
  31. 882
  32. 1274
  33. 686
  34. 285
  35. 2574
  36. 171
  37. 95
  38. 90
  39. 735
  40. 392

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